The 2491-22 M12 cordless Lithium-Ion 2-tool combo kit includes the 1/4" Hex Impact Driver (2450-20) and the Hackzall Reciprocating Saw (2420-20). The innovative M12 cordless Lithium-Ion system is designed to deliver the power and torque required for professional applications, in a size that reaches the tightest and toughest places. Powered by Lithium-Ion, the M12 cordless Lithium-Ion system offers unmatched power, speed, and tool belt portability.